Thread stop-motion for gripping a broken thread in twisting-machines.



B. DUTKIEWIOZ. THREAD STOP MOTION FOR GRIPPING A BROKEN THREAD IN TWISTING MAGHINBS.

APPLICATION FILED JUNE 0, 1913.

I Patented Dec. 23, 1913.

coLuMmA PLANOGRAI'II (10.. WASYIINMIUN u c UNITED STATES PATENT ornron'.

BoLEsLAw DUTKIEWICZ, or Loinz, RUSSIA.

Specification of Letters Patent.

Patented Dec. 23, 1913.

Application filed. June 6, 1913. Serial No. 772,168.

To all whom z't may concern Be it known that I, Bonnsmw Dorme- WIGZ, a subject of the Emperor of Russia, residing at Lodz, Russia, have invented certain new and useful Improvements in Thread Stop -Motio1'1s for Gripping a Broken Thread in Twistirig-Machines, of which the following is a specification.

This invention relates to a thread stop motion for gripping a broken thread for the purpose of preventing the thread from being wound on the cylinder and thus avoiding the conseqiilent loss of time and yarn.

The object of the invention is to provide for a construction prevei'iting all access of dust to the gripping place so that thebroken thread is surely gripped up.

Besides this invention provides for means for regulating the thread tension consisting in a weight slidably mounted on the lever of the thread stop motion and producing a more or less intensive tension of the thread corresponding to the distance of the axis of lever. These regulating means are necessary because of the different strength of threads which are to be handled in twisting machines.

Finally the invention provides for means for facilitating the introduction of the thread into the thread stop motion.

The invention will be now described by aid of the accompanying sheet of illustrative drawings.

In the drawings: Figure 1 is a side view of the thread stop motion applied to a twisting machine. Figs. 2 and 3 are side views drawn to a larger scale showing the thread stop motion respectively when gripping the thread and when in its normal position. Fig. i is a front view of the main portion of the thread stop motion; and Fig. 5 is a plan of the thread stop motion.

As shown the twisting machine itself retains substantially its ordinary construction. The thread 1 is drawn from the thread spool 2 which is mounted on pins 3 on the framing of the machine. The thread 1 passes first around the lower roller 4, then around the upper roller 5, and goes finally to the thread bobbin 6.

The thread stop motion is mounted on a longitudinal bar 7 by means of a plate 8 which may be of U-shape and is fixed on the bar 7 by means of a screw or screws 9. The upper end of this plate 8 carries a sleeve 10 inclosing the pivot pin 11 of the thread stop motion. This pin 11 and the sleeve 10 are each provided with slots 12 (Fig. 3) whereby two tongues are formed on the sleeve and pin, namely a lower tongue 13 and an upper tongue 14. The ends of the slotsare formed with preferably round and slightly enlarged openings 1.6.

In the working of the machine the thread passes through the enlarged rounded inner end 16 of the slot 19. The sleeve. 10 is formed with a transverse slot 17 (Fig. 5) through which a screw 18 passes and enters the pin 11. The arrangement is designed to limit the extent to which the pin 11 can turn in the sleeve 10.

The non-slotted end of the pin 11. carries a lever 19 on one end of which is a sliding weight 20. The lever 19 is preferably formed with a. number o't holes 21 in which a screw can be inserted for fixing the weight 20 at different distarmes from the pin 11, the weight being shifted nearer the said pin when dealing with fine thread, whereas it is moved farther away from the pin for coarse thread. The other end of the lever 19 is constructed as a thread guide 23 having a hooked end 2-1- tor guiding the thread.

For the purpose of guiding the thread through the slot 12, a thread guide 25 is provided on one side oi. the plate 8 and a thread protector 26 is arranged on the other side.

The operation of the improved apparatus is as follows: In the normal working of the twisting machine the thread stop motion is maintained in the position shown in F 1 and 3 by the tension of the thread. In this position the slots in the sleeve 10 and the pin 11 coincide with each other so that the thread is able to pass freely therethrough the parts 25 and 26 maintaining the thread in such a position that it passes through the slot without friction, so that only the readily replaceable parts 25 and 26 are subjected to wear. It the thread should happen to break the weight 20 comes into operation and the thread. assumes the position shown in Fig. 2. By this means the thread is gripped very effectively and reliably between the pivot pin 11 and the sleeve 10 because it is gripped at two places, namely on both of the slots 12, and it is also made to assume a zig-zag term. It is reliable because the gripping surfaces of the sleeve and the pivot pin are not exposed to contact with dust in any way, since they are completely shut in, so that they must necessarily remain always quite clean, and

as will be clearly understood, a depos1t of dust on the two surfaces of the slot 12 that surround the thread has no influence what ever on the action and reliability of the thread stop motion. At the same time as will also be perceived from Fig. 2, the broken ofl' portion 1 of the thread is lifted by the swung-up thread guide 23 out of the range of: the thread bobbin and rollers 4 and 5, thus preventing also any interference with the machinery or working parts from this cause. The thread guide in swinging up with the broken off portion of the thread hanging from it also draws the attention of the attendant who can then immediately remedy the fault.

As already stated hereinbefore the insertion of the thread is facilitated according to this invention by making the part 14 shorter than the part 13. By this shortening a kind of saddle 15 is produced that serves as a guide for the thread which is to be inserted and which can be inserted without trouble into the slot 12 and the openings 16.

Having now described my invention, what I claim is:

1. A thread stop motion comprising a sleeve provided with a longitudinal slot, a

pin pivotally mounted in the said sleeve and likewise provided with a longitudinal slot, the two slots normally registering with each other and allowing the passage of the thread, a double armed lever fixedly connected with the non-slotted end of the said pin and a weight slidably mounted on the one arm of the said lever the other arm terminating in a hook supporting the thread.

2. A thread stop motion comprising a sleeve provided with a longitudinal slot, a pin pivotally mounted in the said sleeve and likewise provided with a longitudinal slot, the two slots normally registering with each other and allowing the passage of the thread, a double armed lever fixedly connected with the non-slotted end of the said pin and a weight slidably mounted on the one arm of the said lever the other arm terminating in a hook supporting the thread, the said pin and sleeve being shortened above the slot so that the projecting lower portion of the pin and sleeve serves as a guide for inserting the thread.

In testimony whereof I afliX my signature in presence of two witnesses.

BOLESLAW DUTKIEWICZ. lVitnesses FRANCIS TREMBIGKI, ANDREI KUoNAJ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. G. 

